Size of the Vela Pulsar's Radio Emission Region: 500 Kilometers
Size of the Vela Pulsar's Radio Emission Region: 500 Kilometers
复制标题
Vela Pulsar 无线电发射区域的大小：500 公里
DOI：
10.1086/310734
复制
发表时间：
1996
期刊：
影响因子：
--
通讯作者：
D. Jones
中科院分区：
文献类型：
--
作者：
C. Gwinn;M. Ojeda;M. Britton;J. Reynolds;D. Jauncey;E. King;P. McCulloch;J. Lovell;C. Flanagan;D. Smits;R. Preston;D. Jones
我们利用船帆座脉冲星的星际散射来确定其发射区的大小。我们发现Vela超新星遗迹的射电散射使源的宽度增加了3.3 ± 0.2 mas × 2.0 ± 0.1 mas，长轴的位置角为92° ± 10°。从脉冲星闪烁的调制，我们推断脉冲星的发射区的大小为500公里，估计的不确定性约为2倍，包括系统误差。我们认为，脉冲星磁层内的无线电波折射可以合理地解释这种大小。
We use interstellar scattering of the Vela pulsar to determine the size of its emission region. We find that radio-wave scattering in the Vela supernova remnant broadens the source by 3.3 ± 0.2 mas × 2.0 ± 0.1 mas, with the major axis at a position angle of 92° ± 10°. From the modulation of the pulsar's scintillation, we infer a size of 500 km for the pulsar's emission region, with an estimated uncertainty of about a factor of 2, including systematic errors. We suggest that radio-wave refraction within the pulsar's magnetosphere may plausibly explain this size.